<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
 div{
     width: 100vw;
     line-height: 100vh;
     height: 100vh;
     font-size: 5vw;
     text-align: center;
 }
</style>
<body>
   <div>
       你好,holle,word
   </div> 
</body>
</html>